摘 要本设计为一种温控风扇系统，具有灵敏的温度感测和显示功能，系统AT89C52单片机作为控制平台对风扇转速进行控制。可由用户设置高、低温度值，测得温度值在高低温度之间时打开风扇弱风档，当温度升高超过所设定的温度时自动切换到大风档，当温度小于所设定的温度时自动关闭风扇，控制状态随外界温度而定。所设高低温值保存在温度传感器DS18B20内部中，掉电后仍然能保存上次设定值，性能稳定，控制准确。关键词： 自动控制;单片机;温控AbstractThis design is a kind of temperature control fan system, has the sensitive temperature sensor and display function, system AT89C52monolithic as control platform to control the fan speed. High and low temperature can be set by the user, the measured temperature value between high and low temperature open the fan when the windshield, when temperature exceeds the set temperature automatically switch to the wind, when the temperature is less than the set temperature automatically shut down the fan, control state varies with temperature. Set high and low temperature values stored in internal temperature sensor DS18B20 E2ROM, after power off can still be saved the set value, stable performance and accurate control.Key words: Automatic control; Single chip microcomputer; Temperature control目录第一章 整体方案设计...................................................................................................................................21.1 前 言.............................................................................................................................................21.2 系统整体设计.................................................................................................................................21.3 方案论证..........................................................................................................................................31.3.1 温度传感器的选择.........................................
